UserAgent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2966.0 Safari/537.36

Steps to reproduce the problem:
1. rendering with webgl like big images. 
2. download files by Image  or XMLHttpRequest or something.
3. freezing during short time

What is the expected behavior?
smooth rendering
no freezing during update or rendering

What went wrong?
Freezing. bad feeling is occurred by this issue

Did this work before? No 

Chrome version: 57.0.2966.0  Channel: canary
OS Version: 6.1 (Windows 7, Windows Server 2008 R2)
Flash Version: 

this issue feel critical to develop game.
All of game will be not. 
if don't need download during playing game. 
if every data can download before enter game

this issue will be not happened

but big game is not.  
to reduce downloading time, we try many things..

so we load(downloading and use) real time except necessary resource to play.

thx